Rotary oil burner



A. H. BALLARD.

ROTARY olL BURNER.

APPLICATION FILED DEC. 26, 1918.

1,429,554. .I Patented Sept. 19, (1922.

'Patented Sept., i9, i922.,

STATE Laatst earner naaien,

ARTHUR E. BALLARD, OF SAN FRANCISCO, CALIFORNIA, .LSSIGNOR TO BALLARD OIL BURNING EQUIPMENT COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

ROTARY OIL BURNER.,

Application filed December 26, 1918, Serial No., 268,375.

To aZZ whom t may Jo/neem.' l

Be it known that I, ARTHUR H. BALLARD, of San Francisca,` in the 'county of'San Francisco and State of California, a citizen of the United States, have invented a new and useful Improvement in Rotary Oil Burners, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification, in eX- plaining its natureo The present invention relates to an improvement in rotary oil burners employing a centrifugal atomizer or atomizing cup for reducing the oil into a fine spray.

t is among the objects of my invention to obtain an .improved means or device by which the oil is fed and applied to the interior of the cup, and to obtain a quicker and more eective control of the oil in its relation to the cup than has hitherto been obtained, both for excluding the oil from the cup and its admission to 1t.

According to practices hitherto employed the oil has still continued to ow into the cup after the valve controlling the feed has been closed and rotation of the cup stopped. The reason for this is that dependence has been placed either in whole or in part upon gravity for eecting the feed of the oil, and

as the cut- 0E valve is placed some little dis-- tance away from the cup in the pipe connection, the oil within the ipe forward of the valve willl continue to ow into the cup after the valve has been closed. This after dow of oil is very slow owing to atmospheric pressure, but continues neverthelessfor an appreciable length of time and resul-ts in filling the cup with an undesired amount of oil, daubing it and supplying it in too great excess to become properly atomized when the cup is/set in operation, thereby intertering with a quick .lighting of the burner.'

Apart from the objection )ust referred to, a further disadvantage overcome by my invention is that when the cut-0E valve is opened for supplying oil to the cup the oil must lill the pipe beyond the cut-ofi valve between it and the cup before the burner can become effectively lighted, which prevents aquick lighting of the burner.

A still further object of my invention is to provide an improved means by which the oil may be applied to the cup, my purpose being to apply the oil in a relatively character and in Which- Figure l is a cross vertical section.

A .F 1g. 2 is a section on the line 2--2 of Fig., l, and

41g. 3 is a cross 'section showingl a slight modication, in construction.,

Referring to the drawings l represents a rotary atomizing cup of any well known character, which is mounted upon `a, stem 2 connecting with any suitable mechanism (not shown) for rotating it and the cup.

3 is a stationary oil delivery'pipe through 4which the oil is introduced into the cup.

Within this pipe is arranged a cut-od valve 4, and the pipe connectsl with any suitable source of oil supply (not shown). rlheoil dellvery plpe connects within the cup with a stationary upturned, troughlike receptacle o capable of maintaining a head of oil withln it when the cut-od" is closed and the delivery pipe beyond said cut-od' is in a position where oil thereinwill gravitate therefrom. 7 represents the bottom of the receptacle adjacent to which the delivery pipe connects, 8, 8 the sides and 9, 9 the ends of the receptacle, The top of the receptacle facing the interior of the cup is open. The receptacle is preferably made .il-shaped as shown, the diverging sides being angularly arranged.

The preferable disposition of the recepwith the free rotation of the cup. rlhe re ceptacle is preferably arranged adjacent the interior end or bottom of the atomizing Ycup and extends some appreciable distance into the same so that the receptacle is capable of holding a considerable amount of oil and the top edges l0 of its sides will be of some appreciable length. The arrangement of thereceptacle is also preferably such that the top side edges 10 Will extend on lines substantially parallel with the axis ofthe cup.

Preferably arranged upon the bottom of the cup and extending longitudinally thereof is a downwardly-depending oil-distributing wing 12. This wing extends the full length of the-receptacle.

The operation is as follows: Oil admitted through the delivery pipe will first fill the oil-receiving receptacle or trough 6. As the inliow ofv oil continues the oil will flow out of the trough over the top edges 10 of its sides and, if the inflow of oil is not excessive, as' the oil Hows over the. edges 10 it will cling to the trough by capillarity 'and low dwn the sides onto the oil-distributing wing 12 and drop off the same into the interior of the cup, the same eifect prevailing if the wing were eliminated (as in Fig. 3),-

for in such case the oil wo-uld drop off the bottom of the receptacle or trough instead of the wing. l prefer, however, to employ the Wing. As the inflow of oil into the receptacle is increased, and especially as the oil tends to become ,heated and more Huid during the operation of the device, instead of flowing downwardly over the sides of the' receptacle it may flow overthe top side edges 10 thereof and drop directly onto the interior surface ofthe cup, although in such case some oil' will at any rate follow the sides of the receptacle and drop oil' the oil-y distributing wing. In any event the oil will be applied to the cup: in a comparatively thin, even layer or layers, and such application may be at one or more points depending upon the fluidity of the oil and the rate at which it is being introduced into the oilholding receptacle.

Apart from the manner of application of the oil to the interior of the cup, in accordance with the objects of my invention, it willbe seen that when the valve is closed for shutting of the supply of oil, only that amount of oil within the receptacle capable of flowing over the dam provided by the side edges of the receptacle will be admitted to the interior of the cup and this amount of oil being very slight will be taken care of by the rotation of the cup which continues, in practice, to rotate by reason of its momentum for an appreciable time even after rcombinatlon w1th a rotary atomizing cup` of the mechanism for rotating it has been shut off.

A further advantage in accordance 'with the objects before referred to is that after top edges of its sides. As such introduction of oil need be very slight and as the rising of the level of the oil within the receptacle is practically instantaneous with the open' ing of the valve, a very quick starting of the burner can be effected.

While l have stated that the to-p edge of the sides of the receptacle are spaced from the interior surface of the cup suiiiciently to enable oil rising within the receptacle to liow over these edges, yet the edges may be extended so far that the oil may not freely pass over thesame from within the receptacle excepting when the oil rises so high within the receptacle as to engage the surface of the cup, when it will be carried ott by a wipin action.

Having 5ms fully described my invention, l claim and desire to secure by Letters Patent of the United States 1. lln a burner of the type specified, the combination with a rotary atomizing cup, of a stationary' delivery pipe through which oil is introduced into the cup, a cut-off in said pipe, a stationary upturned receptacle within the-cup with which the delivery pipe connects and into which the oil is initially fed,

said receptacle being arranged whereby it will maintain a head of oil within it when the cut-0H is closed and the delivery pipe beyond said cut-off is in a position where oil therein Will gravitate therefrom, said receptacle presenting also an edge over which the loil will pass into the cup from the head of oil maintained Within the receptacle during the feeding of the oil and rotation of the cup.

2. ln a burner of the type specified, the combination with a rotary atomizing cup, of means for feedingoil to the interior of the cup, the same comprising a stationary delivery pipe, a cut-olf in said pipe, a stationary upturned receptacle within the cup with which the delivery pipe connects and into' a stationary delivery p ipe through which oil is'introduced into the cup,a cut-ofi' in said pipe, a stationary receptacle Within the cup vso Maaeaa with which the delivery pipe connects and into which the oil is fed, said receptacle being arranged whereby it will maintain a head vof oil within it when the cut-od' is closed and the delivery pipe beyond said cutoff is in a position Where oil therein will gravitate therefrom, said receptacle presenting also one or more edges by which oil iowing out of said receptacle during the rotation of the cup and feeding of the oil will be directed onto the interior surface of the cup in a relatively thin layer.

4. ln a burner of the type specified,` the combination with an atomizing cup, of means for feeding oil into the cup, the same comprising in part an upturned receptacle into which the oil is fed and capable of maintaining a head of oil within it, the top of said receptacle co-operating in part with the interior surface of the cup to form a substantially tight joint therewith and presenting in part an edge spaced from the interior surface of the cup whereby oil rising within saidv receptacle from the head of oil maintained therein may be directed out of the receptacle and deposited upon the surface of the cup in al substantially thin layer.

5. In a burner of the type specified, the combination with an atomizing cup, of means for feeding oil into the cup, the same comprising in part an upturned receptacle into which the oil is ted and capable of maintaining a head of oil within it, the top of said receptacle (zo-operating in part with the interior surface of the cup to form a substantially tight joint therewith and present- 6. ln a burner of the type specified, the` combination with an atomizing cup, of means for feeding oil into the cup, the same comprising an upturned substantially V-shaped receptacle located within the cup and capable of maintaining within it a head ot' oil, said receptacle presenting sides and ends, the ends of said receptacle at the top edges thereof (5o-operating with the interior surface of the cup to form therewith a substantially tight joint, the sides of said receptacle at the top edges thereof being spaced from the interior surface of the cup and extending on linessubstantially parallel with the axls of the cup, said receptacle presenting also a bottom edge likewise extending on lines substantially parallel with the axis of the cup.

ARTHUR H. BALLARD. 

